IEEE journal of radio frequency identification最新文献

{"title":"A Low-Cost 3D-Printed Broadband Sinusoidal-Shaped Patch Antenna With Coplanar Microstrip Feed","authors":"Giovanni Andrea Casula;Giorgio Montisci;Giuseppe Valente","doi":"10.1109/JRFID.2026.3674681","DOIUrl":"https://doi.org/10.1109/JRFID.2026.3674681","url":null,"abstract":"This paper introduces an advanced architecture for wideband microstrip patch antennas (MPAs) that addresses the intrinsic limitations of narrow impedance bandwidth and significant feed-line losses associated with thick dielectric substrates. The proposed solution integrates two primary innovations: a sinusoidal vertical patch profile, enabled by precision 3-D printing, and a locally hollowed substrate for active loss mitigation. Unlike traditional designs that utilize a uniformly thick dielectric to maximize bandwidth at the expense of efficiency, this approach confines the supporting material strictly to a thin dielectric layer beneath the radiating patch. This structure significantly reduces dielectric losses and suppresses surface wave excitation along the coplanar microstrip feed line. Leveraging this 3-D geometry, wideband impedance matching is achieved using a single open-ended stub integrated within the hollowed region. Experimental results demonstrate a fractional impedance bandwidth exceeding 26.5%, representing a 40% improvement over state-of-the-art coplanar-fed designs and reaching performance levels comparable to more complex, less-integrable coaxial probe-fed antennas. Furthermore, the 3-D curvature effectively reduces the antenna projected resonant size, providing a compact footprint ideal for the high-density integrated circuits of modern communication systems.","PeriodicalId":73291,"journal":{"name":"IEEE journal of radio frequency identification","volume":"10 ","pages":"232-242"},"PeriodicalIF":3.4,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147606335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Camera-RFID Fusion for Robust Asset Tracking in Forested Environments","authors":"John Hateley;Sriram Narasimhan;Omid Abari","doi":"10.1109/JRFID.2026.3722120","DOIUrl":"https://doi.org/10.1109/JRFID.2026.3722120","url":null,"abstract":"Passive RFID tags offer a cost-effective and scalable solution for tracking numerous deployed assets. However, in forested environments, signal attenuation and multipath effects generally limit RFID spatial accuracy to the meter level. Conversely, while cameras employing stereo vision can achieve centimeter-level precision, relying solely on computer vision fails to resolve issues arising from spatial association ambiguity and partial occlusions in dense settings. Fusing these modalities allows systems to harness the high-accuracy benefits of vision while retaining the robust, non-line-of-sight identification advantages of RFID. Yet, a primary challenge in achieving this, which is the central focus of this paper, lies in accurately associating the disparate trajectories generated by these two sensors. To overcome this limitation, we introduce a novel camera–RFID fusion framework that integrates depth and object information with advanced trajectory-matching algorithms. RFID tag trajectories are generated using a combination of Gaussian Process regression and Extended Kalman Filters, while visual trajectories are extracted from a depth camera. To account for high spatial uncertainty and match each tag-object pair, these trajectories are associated using a combination of uncertain Fréchet distance, Mahalanobis distance, and global greedy assignment, a framework that has not been previously implemented to the best of our knowledge. We validate this approach against the <inline-formula> <tex-math>$L_{2}$ </tex-math></inline-formula> norm and Dynamic Time Warping (DTW) schemes that frame existing literature. By successfully fusing vision and RFID modalities, the proposed approach helps achieve reliable tag localization even when assets temporarily leave the camera’s field of view. The proposed algorithm was evaluated along side published association algorithms via a scalability simulation study up to 80 tags to evaluate theoretical limits, and proof of concept outdoor field trials with multiple walking participants. These trials demonstrated that the proposed framework significantly outperforms baseline matching methods, representing the first application of camera–RFID fusion for asset tracking in natural forested environments.","PeriodicalId":73291,"journal":{"name":"IEEE journal of radio frequency identification","volume":"10 ","pages":"612-623"},"PeriodicalIF":3.7,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148925931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multi-Parameter Detection for Metal Cracks Based on Chipless RFID Technology and GA-BP Model","authors":"Yingying Liu;Xinwei Chen;Yufeng Liu;Yu Cao;Wenmei Zhang","doi":"10.1109/JRFID.2026.3736926","DOIUrl":"https://doi.org/10.1109/JRFID.2026.3736926","url":null,"abstract":"To realize multi-parameter detection of metal cracks, a type of sensor based on radio frequency identification (RFID) technology is presented. It is a rounded rectangular patch with arc-shaped gaps. When excited by a circularly polarized wave, it can generate two resonant frequencies changing with crack multi-parameter (angle, width, depth and length) sensitively. Further, the Genetic Algorithm-Back Propagation (GA-BP) model is applied to identify features of crack. The accuracies for multi-parameter reach 92%, 98%, 98%, and 97%, respectively. The experimental results show that the sensitivity of the sensor for multi-parameter are 9.833 MHz/°, 24.96 MHz/0.1 mm, 24.48 MHz/0.1 mm, and 18.72 MHz/mm. The proposed detection method can be used for online structural health monitoring (SHM) of metal components.","PeriodicalId":73291,"journal":{"name":"IEEE journal of radio frequency identification","volume":"10 ","pages":"822-831"},"PeriodicalIF":3.7,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149133398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phase-Based Passive Temperature Sensing With Commercial UHF RFID Tags for Ambient IoT","authors":"Zebin Pan;Zhen Chen;Kun Huang;Xiu Yin Zhang","doi":"10.1109/JRFID.2026.3740286","DOIUrl":"https://doi.org/10.1109/JRFID.2026.3740286","url":null,"abstract":"Ambient Internet of Things (Ambient IoT) enables low-cost and battery-free sensing through passive devices that harvest and backscatter radio-frequency signals. However, existing RFID-based temperature sensing methods often rely on customized tags or integrated temperature sensors, increasing hardware cost and limiting large-scale deployment. This paper proposes a phase-based temperature estimation method using commercial passive UHF RFID tags in a separated transmitter–receiver architecture. This architecture separates excitation and reception: an exciter energizes the tag, while a spatially separated three-channel receiver captures the backscattered signal, thereby providing flexible sensing coverage for Ambient IoT applications. A backscatter signal model is established for the separated architecture, and the multi-channel phase measurements are processed using circular-mean estimation, residual-based outlier removal, and interpolation to obtain stable phase features. A least-squares regression model is then constructed using data collected during natural cooling to map the processed phase features to temperature. Evaluation on four independent test trials that were not used for model training shows that, over the temperature range of 30°C to 75°C, averaging the temperature estimates from the three receiving channels achieves an overall MAE of 1.144°C. The MAEs of the individual test trials range from 1.088°C to 1.203°C. Under laboratory conditions, the proposed architecture supports temperature estimation at a maximum experimentally validated tag-to-receiver distance of <inline-formula> <tex-math>$3.0{,}mathrm {m}$ </tex-math></inline-formula>. These results demonstrate the potential of commercial passive UHF RFID tags for low-cost, noncontact temperature sensing in Ambient IoT applications.","PeriodicalId":73291,"journal":{"name":"IEEE journal of radio frequency identification","volume":"10 ","pages":"904-919"},"PeriodicalIF":3.7,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149188550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A UAV-Assisted SWIPT-Enabled Access Point for BLE-Based Batteryless IoT Sensor Node","authors":"Vikas Kumar Malav;Shivam Bansal;Sundeep Kumar;Ashwani Sharma","doi":"10.1109/JRFID.2026.3674841","DOIUrl":"https://doi.org/10.1109/JRFID.2026.3674841","url":null,"abstract":"The deployment of numerous Internet of Things (IoT) sensor nodes (IoTSNs) with batteryless operation is required in rural/harsh environments to reduce the maintenance cost related to battery replacement and achieve self-sustainable operation. To fulfill this requirement, an RF-based wireless power transfer (WPT) technique is used at the IoTSN, and an uncrewed aerial vehicle (UAV)-based access point (AP) is utilized to provide the necessary RF power. In particular, a simultaneous wireless information and power transfer (SWIPT) transmitter technique (<inline-formula> <tex-math>$T_{x}$ </tex-math></inline-formula>) is used at the AP, where WPT is used to wirelessly energize the IoTSN. while wireless information transfer (WIT) is used to collect sensor data from the IoTSN. The conventional <inline-formula> <tex-math>$T{x}$ </tex-math></inline-formula> systems are designed for only communication applications. In contrast, in this study, the simulation and measurement results demonstrate that the proposed <inline-formula> <tex-math>$T_{x}$ </tex-math></inline-formula> system achieves SWIPT operation with a latency of 10 seconds at a distance of 16 meters in a real environment. The system uses a relay-controlled battery power operation to make it more energy-efficient, resulting in a 449.24% increase in operational lifetime, thereby making it suitable for UAV-based BLE-IoTSN applications in harsh environments.","PeriodicalId":73291,"journal":{"name":"IEEE journal of radio frequency identification","volume":"10 ","pages":"188-198"},"PeriodicalIF":3.4,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147558062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Battery-Less RFID-Enabled Capacitive Pressure Sensor Integrated in Textile Fabrics","authors":"Li Peng;Josep Parrón Granados;Sergio López-Soriano","doi":"10.1109/JRFID.2026.3686698","DOIUrl":"https://doi.org/10.1109/JRFID.2026.3686698","url":null,"abstract":"This work presents a battery-less UHF RFID-enabled capacitive pressure sensor based on a multi-layer stacked capacitor (MLSC) architecture, where standard denim acts as a porous and compressible dielectric. An optimized four-layer denim–copper stack produces a nonlinear electromechanical response across the investigated pressure range of 0-4.4 kPa. The measured sensitivity decreases progressively with pressure, from 0.3 pF/kPa at low load to 0.163 pF/kPa at the upper end of the range, with an average sensitivity of 0.19 pF/kPa. Integrated with the capacitive sensing front-end of an EM4152 RFID chip and a conjugate-matched T-match dipole tag, the sensor achieves an empirical limit of detection of 833 Pa. Wireless characterization confirms reliable real-time capacitance monitoring and a maximum read range of approximately 13 m within the ETSI UHF band (865–868 MHz). The proposed platform demonstrates the feasibility of maintenance-free textile-integrated wireless pressure sensing for unobtrusive monitoring scenarios.","PeriodicalId":73291,"journal":{"name":"IEEE journal of radio frequency identification","volume":"10 ","pages":"344-352"},"PeriodicalIF":3.4,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11493474","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147828992","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Numerical Analysis of Quasi-Periodic Concentric Hexagonal Ring Antenna Array Based on the Thue–Morse Sequence","authors":"Francesco P. Chietera;Waleef U. Usmani;Luciano Mescia","doi":"10.1109/JRFID.2026.3690303","DOIUrl":"https://doi.org/10.1109/JRFID.2026.3690303","url":null,"abstract":"This work investigates performance enhancement in phased antenna arrays arranged using a quasi-periodic concentric hexagonal ring array structure. The proposed PAA employs an unconventional geometric layout in which antenna elements are placed on concentric hexagonal rings, with inter-ring spacing determined by the Thue–Morse sequence. The impact of this quasi-periodic variation on array performance is systematically analyzed in terms of half-power beamwidth, sidelobe level, and scan capability, focused on the grating lobes behavior. Simulation results demonstrate that the proposed concentric hexagonal rings array configuration yields measurable improvements if compared with standard ones, especially in terms of grating lobes mitigation, highlighting its potential for advanced phased array applications.","PeriodicalId":73291,"journal":{"name":"IEEE journal of radio frequency identification","volume":"10 ","pages":"366-374"},"PeriodicalIF":3.4,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11509326","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147937669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimal Receiver Processing for Passive UHF RFID in Pulsed-Wave Mode","authors":"Romain Borgna;Julien Huillery;Yvan Duroc;Arnaud Bréard","doi":"10.1109/JRFID.2026.3703830","DOIUrl":"https://doi.org/10.1109/JRFID.2026.3703830","url":null,"abstract":"It is well established that replacing the traditional continuous-wave signals with pulsed-wave signals improves the performance of passive UHF (Ultra High Frequency) RFID (Radio Frequency Identification) systems in terms of wireless power transfer. However, the impact of this change on the performance of these systems in terms of information transmission has been little analyzed. Based on the maximum ratio combining principle, this paper describes the optimal multi-carrier receiver processing that maximizes the information performance of passive UHF RFID systems in pulsed-wave mode. In addition to the theoretical description of the processing, numerical simulations are performed to test the estimators required for the proposed combination process. Finally, experimental measurements are performed to confirm the feasibility of the proposed processing with real data and verify the performance stated in the theory.","PeriodicalId":73291,"journal":{"name":"IEEE journal of radio frequency identification","volume":"10 ","pages":"401-414"},"PeriodicalIF":3.7,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148443385","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Skin Organoid Growth Monitoring Using RFID Tag Coupled to Embedded Split-Ring Resonator","authors":"Mohammed S. Salim;Benito Sanz-Izquierdo;Alexander J. Casson;John C. Batchelor","doi":"10.1109/JRFID.2026.3679410","DOIUrl":"https://doi.org/10.1109/JRFID.2026.3679410","url":null,"abstract":"A passive UHF RFID tag is proposed to monitor the growth of skin organoid cultures. The tag consists of three main components: a dipole antenna, a Magnus S2 transponder, and a sensing structure that electromagnetically couples energy to a split-ring resonator (SRR) embedded within a skin culture inside a Petri dish. The tag is optimized through simulations to achieve sufficient sensitivity while maintaining acceptable transmission performance. A skin phantom composed of 1 mm thick ham layers was used to emulate the progressive growth of the dermal tissue. The dielectric properties of the phantom are experimentally measured and confirmed to be suitable for mimicking human skin. Practical measurements are carried out using a fabricated tag and a Voyantic Tagformance Pro reader. The measured sensor code detects tissue growth up to 3 mm with a resolution of 0.5 mm. The tag also exhibits a consistent read range of approximately 8 m at 868 MHz, confirming reliable wireless communication and stable sensing performance throughout the measurements. The RFID tag system offers applications for non-invasive monitoring of tissue development in organoid cultures.","PeriodicalId":73291,"journal":{"name":"IEEE journal of radio frequency identification","volume":"10 ","pages":"254-261"},"PeriodicalIF":3.7,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148504442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Comprehensive Review of Material Engineering Aspects for Chipless RFID","authors":"Desapriya J;Devisowjanya P;Sakthi Abirami Balakrishnan;Ganesh Kumar Chellamani;Aishwarya N","doi":"10.1109/JRFID.2026.3718722","DOIUrl":"https://doi.org/10.1109/JRFID.2026.3718722","url":null,"abstract":"Chipless Radio Frequency Identification is emerging as a transformative, economical, and battery-free innovation which is key for object identification and sensing applications. By eliminating the need for integrated circuits, chipless RFID significantly reduces both cost and complexity compared to traditional RFID systems. The performance, reliability, and functionality of passive chipless tags are critically influenced by the materials employed for conductive and substrate components. This review presents a comprehensive analysis of material engineering strategies for chipless RFID tags, addressing their dual role in identification and sensing applications. It provides an in-depth examination of diverse material classes including metals, conductive polymers, nanomaterials, and composite inks that play an influential role in electromagnetic signature stability, read range, quality factor, and environmental robustness for identification. Electrical conductivity, flexibility, and environmental stability are properties of materials that are examined in relation to specific application areas, including identification in logistics, structural health monitoring, smart packaging, and biomedical sensors. Recent advancements in smart materials namely carbon allotropes like graphene carbon nanotubes (CNTs), and polymer–ceramic composites are also discussed for their role in enhancing sensing resolution and mechanical integrity. Additionally, this paper outlines fabrication strategies and key challenges associated with material integration. The review aims to establish material engineering as a cornerstone for enhancing the performance and scalability in lieu of chipless RFID systems, thereby accelerating their adoption in real-world scenarios.","PeriodicalId":73291,"journal":{"name":"IEEE journal of radio frequency identification","volume":"10 ","pages":"562-585"},"PeriodicalIF":3.7,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148746976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}